Flap valve



` Aug, M2 192%,

mm2@ Z. VENCL FLAP VALVE Filed March Z1 i924 Z .Ve/70V y 3&1@ his @Monuc/lgs.

ZDENEK VENCL, OF PRAGUE-SMICHOV, CZECHOSLOVAKIA.

FLAP VALVE.

Application Iled March 31, 1924. Serial No. 703,219.

To` all tell/mn` t may concern.' j valvev plate A is provided near its rim with Be it known that l, Zonivnii- VENCL, a hub-lilre projection B, in the bore of which citizen of the Czechoslovakian Republic7 operatesa spindle C rotatably mounted in residing at Prague-Smi'ch'ov, Vacla-vka Q5, the valve housing T at right angles to the Czechoslovakia, have invented new and use axis of the opening at the valve seating 6c fulflfinprovenients Relating to Flap Valves, sothat the valve plateV A is freely susof which the following is a specification. pended on this spindle C between the two The? present invention relates tov flap small pipes or bushes S (Fig. 4). The valves and means for operating the same spindle 4C is' secured against axial thrust and has among its objects to facilitate: the bymeans offthe screw M and its free end, e5 opening-of the' saine. j projecting from the valve body is rigidly Another object of the invention is'to proconnected by a pin R to a hand lever E videjmeans whereby the valve itself acts as" between which and a stuffing box is a spring a lever in the initial opening movement. Z mounted on the hand lever. A further object is to provide simple and The bore provided in the projection B is 7o effective means for actuating a flap valve. of non-circular cross section and substanv With these and other objects in view the tially corresponds in outline with the outl invention comprisesnovel features of conline of a controlling cam. A circular por- 5 struction and combinations of parts which tion of this outline nearest the valve plate willbe hereinafter described and claimed. has the same radius as the spindle C. ln 7.5 i According to they present invention in vone that portion of the outline which extends of .its vaspects a flap valve and means for in continuation of the circular portion in operating the saine are so constri'ictedthat, the direction towards the, axis of the openwhen opening, the valve is firstraised away"v ing of the valve `seat the radius increases fromiitsseatingfby'acting in the manner suddenly and reaches its maximum at the S0 of a lever bearing against a pointof the point a, whereupon itis gradually reduced seating and is then swung into a` plane at until it reaches apoint ZJ substantially diright angles to that of the seating.` ametricallyopposite the point a when it is A preferred constructional form of flap again equal to the radius of the spindle. valve adapted to Open in this manner cornln a longitudinal groove in the spindle S5 prises a valve plate having a projection near C an eccentric device in the form of a relier the rim of the plate adapted to receive an D is rotatably mounted. This is of such operating spindle disposed at right angles diameter that it projects radially from the to the axis of the valve seating, which spinsurface of the spindle C for a distance equal dle is provided with an eccentric device such to half the difference between the largest 00 that turning of the spindle co-operates with and smallest radii of the bore. a bore of appropriate non-circular shape in ln the closed position in which the valve the projection on the valve plate in order plate A `rests against the seating F (Fig. firstly to raise the valve plate 'by lever l) the spindle C is turned in such a di- 40 action on the point of the seating farthest rection that the roller l) bears against the 95 removed from the spindle, the valve meaninner surface of the bore at a. lf the valve while not partaking of the turning move is to be opened, the spindle C is turned antiment of the spindle, and secondly on furclockwise by means of the lever E. Durther turning of the spindle to swing the ing this operation the valve plate A bearvalve plate into a position at right angles ing on the seating at a point farthest re- 100 to the surface of the seating. moved from the spindle C will iirst be ln the accompanying drawings Figs. l, raised from the seating surface in the man- Q and 3 illustrate by way of example in ner of a lever and is thus unloaded. This axial section and in three different positions continues until the circular portion of the one constructional embodiment of the in bore bears tightly against the spindle C N35 vention and Fig. 4 is a cross sectional view. (Fig. 2). Cn further turning of the spin v- Figs. 5 and 6 illustrate two further forms dle C the valve plate A will be moved by of construction. the spindle C and be swung into a position Referring first more particularly to the at right angles to the plane of the seating construction shown in Figures l to 4 the surface (Fig. 110

The roller D may be replaced by a spring seated in the spindle C (Fig. 5) or by an eccentric D2 (Fig. 6).

While specific constructional forms of the invention have been herein described in detail it Will be understood that the invention might be carried out by other means all coming Within the scope of the appended claims. v

What I claim is l. A flap valve comprising a housing a valve plate `a seating for said valve plate in said housing, a projection adjacent the rim of said valve plate formed With a noncircular bore, an operating spindle rotatably mounted in said housing at right angles to the axis of the valve seating,

i on said spindle co-operating with the said bore on rotation ofl the spindle to raise the valve plate by lever action on the point of the said seating furthest removed from said spindle.

2. A flap valve comprising a housing a valve platea seating for said valve' plate in said housing, a projection adjacent the rim of said valve plate formed with a non` circular bore, an operating spindle rotatably vmounted in said housing at right anglesl to the aXis of the valve seating, eccentricl means on said spindle co-operating with the said bore on rotation of the spindle to raise the valve plate by lever action on the point of the said seating furthest removed from said spindle the valve meanwhile not partaking of the turning movement of the spindle, and means for rotating the said spindle.

8. A flap valve comprising a housing, a

vthe said bore on valve plate and a seating for said valve plate in said housing', a projection adjacent the rim of said valve plate formed with a noncircular bore, an operating spindle rotatably mounted in said housing' at right angles to the axis of the valve seating, means for rotating said spindle, eccentric means on said spindle cio-operating with rotation ot the spindle to raise the valve plate initially without causing said valve plate to partake of the rotary movement of said spindle, and then to lock said valve plate to said spindle for rotation therewith. i

l. A flap valve comprising a housing7 a valve plate and a seating for said valve plate in said housing, a projection adjacent the rim of said valve plate formed with a noncircular bore, yan operating spindle rotatably mounted in said housing at right angles tothe aXis of the valve seating, means for rotating said spindle, eccentric means on said the spindle to raise the valve plate initially Without valve plate to partake of the rotary movement of said spindle, and then to lock said valve plate to said spindle 'for rotation therewith into a position at right angles to the surface of the seating, and abutment means 't'or preventing said plate from rotating beyond said position.

In testimony whereof I alix my signature in presence of tivo Witnesses.

. ZDENEK VENCL. Witnesses:

JAN SEKYEKA, RAUL VAMsKA. 

